Systems and methods for anomaly detection in accordance with embodiments of the invention are illustrated. One embodiment includes a method for training a system for detecting anomalous samples. The method draws data samples from a data distribution of true samples and an anomaly distribution and draws a latent sample from a latent space. The method further includes steps for training a generator to generate data samples based on the drawn data samples and the latent sample, and training a cyclic discriminator to distinguish between true data samples and reconstructed samples. A reconstructed sample is generated by the generator based on an encoding of a data sample. The method identifies a set of one or more true pairs, a set of one or more anomalous pairs, and a set of one or more generated pairs. The method trains a joint discriminator to distinguish true pairs from anomalous and generated pairs.
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2. The method of claim 1, wherein the anomaly distribution is a surrogate anomaly distribution.
3. The method of claim 2, wherein the surrogate anomaly distribution is a Gaussian distribution.
4. The method of claim 1, wherein drawing a sample from the anomaly distribution comprises drawing samples from a known set of anomalous data samples.
5. The method of claim 1, wherein the latent space is a random noise distribution.
10. The system of claim 9, wherein the anomaly distribution is a surrogate anomaly distribution.
11. The system of claim 10, wherein the surrogate anomaly distribution is a Gaussian distribution.
12. The system of claim 9, wherein drawing a sample from the anomaly distribution comprises drawing samples from a known set of anomalous data samples.
13. The system of claim 9, wherein the latent space is a random noise distribution.
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June 25, 2020
December 10, 2024
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